Kurzfassung

We present near-IR J H K photometric data of sample of 58 main-sequence, mainly Vega-type, and pre-main sequence stars. The data were taken during four observation runs in the period May 1998 to January 1999 and form part of a coordinated effort with simultaneous optical spectroscopy and photo-polarimetry. The near-IR colors of the MS stars correspond in most cases tp photospheric colors, although noticealbe reddening is present towards a few objects, and these stars show no brightness variability within the observational errors. On the other hand, the PMS stars show near-IR excesses and variability consistent with previous data.

Dokumentart:

Zeitschriftenbeitrag

Zusätzliche Informationen:

LIDO-Berichtsjahr=2001,

Titel:

EXPORT: Near-IR observations of Vega-type and pre-main sequence stars

Autoren:

Autoren

Institution oder E-Mail-Adresse der Autoren

Eiroa, C.

Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain

Garzón, F.

Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain

Alberdi, A.

Instituto de Astrofísica de Andalucía, Granada, Spain

de Winter, D.

TNO/TPD-Space Instrumentation, Delft, The Netherlands

Ferlet, R.

CNRS, Institute d'Astrophysique de Paris, Paris, France

Grady, C. A.

NOAO/STIS, Goddard Space Flight Center, Greenbelt, MD, USA

Cameron, A.

University of St. Andrews, St. Andrews, Scotland, UK

Davies, J. K. Joint Astronomy Center, Hilo, Hawaii, USA),

NICHT SPEZIFIZIERT

Deeg, H. J.

Instituto de Astrofísica de Andalucía, Granada, Spain

Harris, A. W.

NICHT SPEZIFIZIERT

Horne, K.

University of St. Andrews, St. Andrews, Scotland, UK

Merín, B.

L.A.E.F.F., VILSPA, Madrid, Spain

Miranda, L. F.

Instituto de Astrofísica de Andalucía, Granada, Spain

Montesinos, B.

L.A.E.F.F., VILSPA, Madrid, Spain

Mora, A.

Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain

Oudmaijer, R.

Department of Physics and Astronomy, University of Leeds, Leeds, UK

Palacios, J.

Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain

Penny, A.

Rutherford Appleton Laboratory, Oxfordshire, UK

Quirrenbach, A.

Department of Physics, University of California San Diego, La Jolla, CA, USA